标签：return spring Bean new springbootMVC02 class 加载
大纲：本节的问题就是解决"spring和spring MVC要加载对应的Bean，要怎么操作"
一、思考和处理思路
二、对上面图片的总结：
三、对解决方法的"代码块"
3.1 在config包下建"springConfig"用来接收spring的Bean和建"springMvcConfig"用来接收springMvc的Bean
springMvcConfig代码块
//@Configuration 不能有这个，不然被Spring过滤掉的bean又回来了
//@ComponentScan("com.itheima.springbootmvc.controller")，写的是：你需要Bean/实体化的controller包的路径
@ComponentScan("com.itheima.springbootmvc.controller")
public class SpringMvcConfig {
}
springConfig代码块
@Configuration
//目的：spring要扫描除了controller的其他配置文件，因为controller是加载SpringMVC配置的，不是spring加载的
//方法一：指定"service"、"dao"包进行扫描
//@ComponentScan({"com.itheima.dao","com.itheima.service"})
//方法二、排除法
@ComponentScan(value = "com.itheima",
excludeFilters = @ComponentScan.Filter(
type = FilterType.ANNOTATION, //根据注解排除
classes = Controller.class //只要有@Controller这个注解，就排除
)
)
public class SpringConfig {
}
四、对ServletContainersInitConfig进行代码块简化
ServletContainersInitConfig代码块
public class ServletContainersInitConfig extends AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class<?>[] getRootConfigClasses() {
return new Class[]{SpringConfig.class};
}
@Override
protected Class<?>[] getServletConfigClasses() {
return new Class[]{SpringMvcConfig.class};
}
@Override
protected String[] getServletMappings() {
return new String[]{"/"};
}
}
/*
这个"AbstractDispatcherServletInitializer'的底层
public class ServletContainersInitConfig extends AbstractDispatcherServletInitializer {
//加载springmvc配置类
protected WebApplicationContext createServletApplicationContext() {
//初始化WebApplicationContext对象
AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
//加载指定配置类:自己写的"接收Bean"的Config
ctx.register(SpringMvcConfig.class);
return ctx;
}
//设置由springmvc控制器处理的请求映射路径
protected String[] getServletMappings() {
return new String[]{"/"};
}
//加载spring配置类
protected WebApplicationContext createRootApplicationContext() {
//初始化WebApplicationContext对象
AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
//加载指定配置类:自己写的"接收Bean"的Config
ctx.register(SpringConfig.class);
return ctx;
}
*/
标签：return,
spring,
Bean,
new,
springbootMVC02,
class,
加载
From： https://www.cnblogs.com/chen-zhou1027/p/16947263.html